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3 years ago

What does "y-> - «" mean?

Mathematics

1 answer:

frez [133]3 years ago

7 0

Answer:

y approaches negative infinty

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A leprechaun places a magic penny under a girls pillow. The next night there are 2 magic pennies under her pillow. The following

kiruha [24]

Answer:

After 47 days she will have more than 90 trillion pennies.

Step-by-step explanation:

At the beginning there was 1 penny. At the second day the amount of pennies under the pillow became 2.

The amount of pennies doubled each day. So the series is,

$1,2,4,8,16,32,.....$

This series is in geometric progression.

As the pennies from each of the previous days are not being stored away until more pennies magically appear so the sum of series will be,

$S_n=\dfrac{a(r^n-1)}{r-1}$

where,

a = initial term = 1,

r = common ratio = 2,

As we have find the number of days that would elapse before she has a total of more than 90 trillion, so

$\Rightarrow 90\times 10^{12}\le \dfrac{1(2^n-1)}{2-1}$

$\Rightarrow 90\times 10^{12}\le \dfrac{2^n-1}{1}$

$\Rightarrow 90\times 10^{12}\le 2^n-1$

$\Rightarrow 2^n\ge 90\times 10^{12}+1$

$\Rightarrow \log 2^n\ge \log (90\times 10^{12}+1)$

$\Rightarrow n\times \log 2\ge \log (90\times 10^{12}+1)$

$\Rightarrow n \ge \dfrac{\log (90\times 10^{12}+1)}{\log 2}$

$\Rightarrow n \ge 46.4$

$\Rightarrow n\approx 47$

8 0

3 years ago

9/17 in decimal form rounded to the nearest hundredth

Elza [17]

Answer:

0.53

Step-by-step explanation:

8 0

1 year ago

Read 2 more answers

An object travels 4/5 miles in one-half hour. What is its speed?

Ilia_Sergeevich [38]

Answer:

8/5 miles or 1.6 mile per hour

7 0

3 years ago

Solve for x. -3+6=2x-24

Svetlanka [38]

Answer:

13.5=x

Step-by-step explanation:

-3+6=2x-24

3=2x-24

+24 +24

___________

27=2x

÷2 ÷2

___________-

13.5 = x

Hope this helps :D

7 0

3 years ago

Todos los numeros negativos son enteros verdadero o falsom.

Romashka-Z-Leto [24]

Answer:

False

Step-by-step explanation:

numbers are integers, the integers are negative, zero and positive,

while natural numbers are only positive,

therefore the statement is false

. False. Integers comprise negative and positive numbers (...- 3, -2, -1, 0, 1, 2, 3 ...) and natural numbers only comprise positive integers (0, 1, 2, 3 ...)

5 0

3 years ago